US 11,865,511 B2
Preparation method for super absorbent polymer sheet, super absorbent polymer sheet prepared therefrom
Ki Youl Yoon, Daejeon (KR); Gi Cheul Kim, Daejeon (KR); Hyeon Choi, Daejeon (KR); Hyo Sook Joo, Daejeon (KR); and Ju Eun Kim, Daejeon (KR)
Assigned to LG Chem, Ltd.
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Jul. 28, 2022, as Appl. No. 17/875,931.
Application 17/875,931 is a division of application No. 16/630,292, granted, now 11,420,185, previously published as PCT/KR2018/009472, filed on Aug. 17, 2018.
Claims priority of application No. 10-2017-0105814 (KR), filed on Aug. 22, 2017.
Prior Publication US 2022/0362743 A1, Nov. 17, 2022
Int. Cl. B01J 20/26 (2006.01); B01J 20/10 (2006.01); B01J 20/24 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01)
CPC B01J 20/267 (2013.01) [B01J 20/103 (2013.01); B01J 20/24 (2013.01); B01J 20/261 (2013.01); B01J 20/28033 (2013.01); B01J 20/28095 (2013.01); B01J 20/3007 (2013.01); B01J 20/3085 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A super absorbent polymer sheet prepared by a method comprising the steps of:
preparing a monomer composition comprising a water-soluble ethylene-based unsaturated monomer having at least partially neutralized acidic groups, a polymerization initiator, an internal cross-linking agent, a foam stabilizer, an ionic polymeric binder, and an inorganic filler;
preparing a hydrogel polymer by thermal polymerization or photopolymerization of the monomer composition;
drying the hydrogel polymer to form a super absorbent polymer; and
forming the super absorbent polymer into a sheet form,
wherein the super absorbent polymer sheet has a porosity of 25 to less than 80%.